[Snarky Soujo]

The Gust Arrows effect with Aerial Razor will cause the system to spit out a numerical value (between 1 and 4) and will fire only on cardinal directions rather than the extended range given by Gust Arrows.

So if you target off the cardinal, it will still fire as normal, but not where the target is placed, so from where the player is rather than where it is aimed.